129 lines
4.9 KiB
Bash
129 lines
4.9 KiB
Bash
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#!/bin/sh
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#################################################################
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# #
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# Copyright 2010 Fidelity Information Services, Inc #
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# #
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# This source code contains the intellectual property #
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# of its copyright holder(s), and is made available #
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# under a license. If you do not know the terms of #
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# the license, please stop and do not read further. #
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# #
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#################################################################
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#############################################################################################
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#
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# gen_keypair.sh - Generates a new public/private key pair for the current user.
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# The email address identifies the user. It is an error if the gpg keyring exists.
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#
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# Arguments:
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# $1 - Email ID of the current user
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# $2 - Optional; Any residual text on line is full name of user
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#
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#############################################################################################
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# GnuPG uses $GNUPGHOME, if set, for GNU Privacy Guard keyring
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# Script uses $gtm_pubkey, if set for file containing exported ASCII armored public key
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hostos=`uname -s`
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# try to get a predictable which
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if [ "OS/390" = "$hostos" ] ; then which=whence ;
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elif [ -x "/usr/bin/which" ] ; then which=/usr/bin/which
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else which=which
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fi
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# temporary file
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if [ -x "`$which mktemp 2>&1`" ] ; then tmp_file=`mktemp`
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else tmp_file=/tmp/`basename $0`_$$.tmp ; fi
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touch $tmp_file
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chmod go-rwx $tmp_file
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trap 'rm -rf $tmp_file ; stty sane ; exit 1' HUP INT QUIT TERM TRAP
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# echo and options
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ECHO=/bin/echo
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ECHO_OPTIONS=""
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#Linux honors escape sequence only when run with -e
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if [ "Linux" = "$hostos" ] ; then ECHO_OPTIONS="-e" ; fi
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# e-mail address is a mandatory parameter for GnuPG and cannot be null.
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if [ $# -lt 1 ] ; then
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$ECHO "Usage: `basename $0` email_address [Real name]" ; exit 1
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fi
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email=$1 ; shift
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# Identify GnuPG - it is required
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if [ -x "`$which gpg 2>&1`" ] ; then gpg=gpg
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elif [ -x "`$which gpg2 2>&1`" ] ; then gpg=gpg2
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else $ECHO "Able to find neither gpg nor gpg2. Exiting" ; exit 1 ; fi
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# Default file for exported public key, if not specified
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if [ -z "$gtm_pubkey" ] ; then gtm_pubkey="${email}_pubkey.txt" ; fi
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# If nothing on the command line for the user name, use userid
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if [ $# -ge 1 ] ; then gtm_user="$*" ; else gtm_user=$USER ; fi
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# If GNUPGHOME is already defined, then use this as the place to store the keys. If undefined,
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# use $HOME/.gnupg (default for GnuPG)
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if [ -z "$GNUPGHOME" ]; then
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gtm_gpghome="$HOME/.gnupg"
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else
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gtm_gpghome="$GNUPGHOME"
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fi
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if [ -d "$gtm_gpghome" -o -f "$gtm_gpghome" ] ; then
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$ECHO "$gtm_gpghome already exists; cannot create a new directory" ; exit 1
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fi
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mkdir -p $gtm_gpghome
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if [ ! -d $gtm_gpghome ] ; then
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$ECHO "Unable to create directory $gtm_gpghome" ; exit 1
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fi
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trap 'rm -rf $tmp_file $gtm_gpghome ; stty sane ; exit 1' HUP INT QUIT TERM TRAP
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chmod go-rwx $gtm_gpghome
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# Get passphrase for new GnuPG keyring
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unset passphrase
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while [ -z "$passphrase" ] ; do
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$ECHO $ECHO_OPTIONS Passphrase for new keyring: \\c ; stty -echo ; read passphrase ; stty echo ; $ECHO ""
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$ECHO $ECHO_OPTIONS Verify passphrase: \\c ; stty -echo ; read tmp ; stty echo ; $ECHO ""
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if [ "$passphrase" != "$tmp" ] ; then
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$ECHO Verification does not match passphrase. Try again. ; unset passphrase
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fi
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unset tmp
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done
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# Fill out the unattended key generation details including the passphrase and email address
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key_info="Key-Type: DSA\n Key-Length: 1024\n Subkey-Type: RSA\n Subkey-Length: 2048\n Name-Real: $gtm_user\n"
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key_info=$key_info" Name-Email: $email\n Expire-Date: 0\n Passphrase: $passphrase\n %commit\n %echo Generated\n"
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# Run the unattended GnuPG key generation. Any errors will be output to gen_key.log
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# which will later be removed.
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$ECHO Key ring will be created in $gtm_gpghome
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$ECHO Key generation might take some time. Do something that will create entropy,
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$ECHO like moving the mouse or typing in another session.
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$ECHO $ECHO_OPTIONS $key_info | $gpg --homedir $gtm_gpghome --no-tty --batch --gen-key 2> $tmp_file
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# Set up pinentry-gtm so that GnuPG version 2 pinentry will return password from
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# obfuscated password. dir should be an absolute path name.
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dir=`dirname $0`
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if [ -z "$dir" ] ; then dir=$PWD
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else
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case $dir in
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/*) ;;
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.) dir=$PWD ;;
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*) dir=$PWD/$dir ;;
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esac
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fi
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$ECHO "pinentry-program $dir/pinentry-gtm.sh" >$gtm_gpghome/gpg-agent.conf
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$gpg --homedir $gtm_gpghome --list-keys | grep "$email" >> $tmp_file
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if [ $? ]; then
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$gpg --homedir $gtm_gpghome --export --armor -o $gtm_pubkey
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$gpg --homedir $gtm_gpghome --list-keys --fingerprint
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$ECHO "Key pair created and public key exported in ASCII to $gtm_pubkey"
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else
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$ECHO "Error creating public key/private key pairs."
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cat $tmp_file
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fi
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rm -f $tmp_file
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